First: FX-74 doesn't use FSB, it uses Hypertransport instead
Second: Q6600 have 8MB L2 cache, much more than FX-74
Third: Having higher GHz doesn't mean that the processor is better. The older Pentium 4 processors had much higher GHz than Athlon64 but they performed worse. The new Intel core 2 processors can do more instruction per Hz than AMD processors.
Just look at the review I posted above, Core 2 Duo 2.33GHz (E6550) outperformed AMD 2.8GHz (5600+).
I'm not sure if there is overclocking articles for FX-74 but there is power consumption article for FX-74
Click
here to see the article
FX-74 consume too much power
And since they consume too much power, I think they are not good for overclocking
